. 2019 Jul 3;597(15):3853–3865. doi: 10.1113/JP278050

Table 3.

Frequency domain analyses of pacing data using the spectral decomposition method

Phase

Z ₀

Z ₁

Z ₂

Z ₃

Z ₄

Z _ch

Baseline

Z _T

931 ± 100

186 ± 19

120 ± 18

77 ± 15

75 ± 13

151 ± 17

Z _L

661 ± 100^*

161 ± 19

201 ± 18^*

118 ± 15^*

87 ± 13

120 ± 17

Z_{LH}^{*}

272 ± 100

46 ± 19

80 ± 18

69 ± 15

65 ± 13

63 ± 17

DDD pacing

Z _T

1225 ± 122^#

197 ± 25

93 ± 26

75 ± 21

84 ± 20

307 ± 27

Z _L

818 ± 122^*

221 ± 25^#

160 ± 26^*

166 ± 21^* ^, ^#

190 ± 20^* ^, ^#

167 ± 27

Z_{LH}^{*}

559 ± 122^#

119 ± 25^#

98 ± 26

118 ± 21^#

115 ± 20^#

217 ± 27

VVI pacing

Z _T

1375 ± 121^#

206 ± 24

87 ± 26

76 ± 21

111 ± 19

266 ± 26

Z _L

762 ± 121^*

108 ± 24^# ^, ^*

179 ± 26^*

311 ± 21^# ^, ^*

217 ± 19^# ^, ^*

157 ± 26

Z_{LH}^{*}

745 ± 121^#

257 ± 24^#

163 ± 26^#

152 ± 21^#

245 ± 19^#

212 ± 26

Values show the least squares mean estimate ± SE of spectra moduli. All values expressed in dyn·s cm⁻⁵.

^* P < 0.05 (Z _T vs. Z_L);

^# P < 0.05 (phase vs. baseline). Z ₀, steady‐flow component. Z _1 … 4, values at harmonics 1 to 4. Z _ch, characteristic impedance.